6BA-RP4 · DBA-RP4
Honda Step WGN RP4 specs
RP4 is the model code of the Honda Step WGN. Japan’s transport ministry lists it in its fuel economy lists from 2016–2022 under 2 model types 6BA-RP4, DBA-RP4. A genuine car’s chassis number starts RP4-.
RP4 at a glance
- Make
- Honda
- Model
- Step WGN
- Model code
- RP4
- Model types
- 6BA-RP4, DBA-RP4
- In MLIT’s lists
- 2016–2022
- Engines
- L15B 1,496 cc petrol
- Gearboxes
- CVT automatic
- Drive
- four-wheel drive
- Kerb weight
- 1,740–1,790 kg
- Official fuel economy
- 13–15.4 km/L (37–44 mpg)
Fuel economy is from Japan’s official tests and is usually better than you’ll see on UK roads. MLIT doesn’t list power or torque.
6BA-RP4
Listed 2020–2022. The 6BA prefix (our explanation, not MLIT’s) means petrol passenger car certified to Japan’s 2018 emissions rules, 75% below their limits. Check 6BA-RP4 against ULEZ and clean air zones.
| Engine | Gearbox | Drive | Weight | Seats | Fuel economy | Listed |
|---|---|---|---|---|---|---|
| L15B1,496 cc petrol | CVT automatic | four-wheel drive | 1,740–1,780 kg | 7–8 | 15–15.4 km/L42–44 mpg, Japanese JC08 test | 2020–2022 |
| L15B1,496 cc petrol | CVT automatic | four-wheel drive | 1,740–1,780 kg | 7–8 | 13 km/L37 mpg, WLTC test | 2020–2022 |
DBA-RP4
Listed 2016–2019. The DBA prefix (our explanation, not MLIT’s) means petrol passenger car certified to Japan’s 2005 emissions rules, 75% below their limits. Check DBA-RP4 against ULEZ and clean air zones.
| Engine | Gearbox | Drive | Weight | Seats | Fuel economy | Listed |
|---|---|---|---|---|---|---|
| L15B1,496 cc petrol | CVT automatic | four-wheel drive | 1,740–1,790 kg | 7–8 | 15 km/L42 mpg, Japanese JC08 test | 2016–2019 |
Each row is one version as MLIT lists it. A version can appear twice when MLIT gave figures on two tests that year. Low-emission stars and trim names aren’t shown. MLIT gives fuel economy in km/L; the mpg figures are our conversion to UK gallons. Japanese tests are gentler than real UK driving, so expect less.
RP4 build year by chassis number
Japan’s carmakers list the chassis numbers each code was built with every year from 2015. Find the serial below, or use the build year finder.
| Built | Chassis numbers |
|---|---|
| 2015 | RP4-1000001 to 1005397 |
| 2016 | RP4-1005398 to 1007563RP4-1100001 to 1102949RP4-1200001 to 1200001 |
| 2017 | RP4-1102950 to 1105612RP4-1200002 to 1202672 |
| 2018 | RP4-1202673 to 1207228 |
| 2019 | RP4-1207229 to 1212456RP4-1300001 to 1300005 |
| 2020 | RP4-1300006 to 1303323 |
| 2021 | RP4-1303324 to 1308231 |
From the JAMA chassis number lists: 車台番号一覧表. We keep only the chassis code, serial ranges and year. JAMA calls them reference information, not a certificate.
Check an RP4 before you buy
Make sure the car is what the advert says: the chassis number on the V5C should start RP4-, and the engine and gearbox should match one of the versions above. Our free check reads the UK MOT history and compares it with the chassis code.
Other Honda Step WGN model codes
- RF3listed 2004–2005
- RF4listed 2004–2005
- RF5listed 2004–2005
- RF6listed 2004–2005
- RF7listed 2004–2005
- RF8listed 2004–2005
- RG1listed 2006–2010
- RG2listed 2006–2010
- RG3listed 2006–2010
- RG4listed 2006–2010
- RK1listed 2010–2017
- RK2listed 2010–2017
- RK3listed 2010–2017
- RK4listed 2010–2017
- RP1listed 2016–2022
- RP2listed 2016–2022
- RP3listed 2016–2022
- RP5listed 2018–2022
- RP6listed 2023–2026
- RP7listed 2023–2026
- RP8listed 2023–2026
Questions
What engine does the RP4 have?
MLIT lists the Honda Step WGN RP4 with L15B 1,496 cc petrol.
What fuel economy does the RP4 get?
Officially between 13 and 15.4 km/L (about 37–44 mpg), depending on the version, on Japan’s own tests. Real-world figures are usually lower, especially against the older 10-15 mode test.
How heavy is the RP4?
Between 1,740 and 1,790 kg kerb weight, depending on the version.
Is 6BA-RP4 the same as RP4?
Yes. 6BA-RP4 is the full model type: the letters before the hyphen are Japan’s emissions code, which changed as the rules were tightened, and RP4 is the model code. The chassis number starts with RP4-.
About these figures
The model types, engine codes, capacities, gearboxes, drive, weights, seats and km/L figures are copied from MLIT’s yearly lists of cars on sale in Japan each March, so “listed” years are list years, not exact production dates. The English model names, mpg conversions, emissions code explanations and chassis number matching are ours. Lists before 2013 were printed as PDFs that we read by machine; where an older list gives an engine code that doesn’t match its capacity, we’ve used the figure the same model type has in other years. Check anything that matters against the car’s own papers. Spotted a mistake? Email [email protected]. All Honda model codes.
Source: Ministry of Land, Infrastructure, Transport and Tourism (MLIT), Japan, fuel economy lists 2004–2026, used under the Public Data License 1.0. Edited and translated by JDM History.